Question

这样可行，但在通话过程中会冻结页面：

  getAllNewEstate: function(callback) {
    function NewEstateData() {};
    var items = Backendless.Persistence.of( NewEstateData ).find().data;
    callback(items)
  },

如何进行异步通话？

文档： http://backendless.com/documentation/data/js/data_sync_and_async_calls.htm http://backendless.com/documentation/data/js/data_basic_search.htm

更新

我试过了：

  getAllNewEstate: function(callback) {
    function NewEstateData() {};
    Backendless.Persistence.of( NewEstateData ).find( function(e) {
        console.log('event', e);
        callback(e.data);
    });
  },

//没有错误，没有console.log，

  getAllNewEstate: function(callback) {
    Backendless.Persistence.of( NewEstateData ).find( function(e) {
        console.log('event', e);
        callback(e.data);
    });
  },

//未捕获的ReferenceError：未定义NewEstateData

Answer 1

您需要为异步调用查找添加回调：

getAllNewEstate: function(callback) {
    function NewEstateData() {};
    Backendless.Persistence.of( NewEstateData ).find( new Backendless.Async(
        function(e) {
             console.log(e);
             callback(e);
        })
    );
}

异步调用后端数据

1 个答案: